Form: 122189 © 2012 Sensata Technologies
6
3.5.1 Inverter chassis
is “designed to meet” Nema 4X:
This chassis requires special
handling and attention if the design objectives are to be met. We need to install the chassis
system correctly or water will find a way to get inside. The inverter has silicone seals for the top,
side and DC cover plate. There is NO reason to take off the top or side cover plates!
The DC cover plate will need to be installed correctly. The DC box has DC power cables that
have Heyco strain relief connectors that are to be tightened as follows: Sealing nut (outside of
the DC box) is to be at 80 in lbs. and the locking nut (inside the box) is to be set at 60 in lbs.
The AC cable has the same Heyco strain relief that is connected to the chassis end at the
factory to the same specs. There is a special pressure release valve installed at the factory.
! NOTE: The DC cover plate screws must be started by HAND first to make sure that you have
the correct orientation for the screws and then tightened to 16 in lbs in a specific sequence.
! NOTE:
The inverter serial number and date code are inside the DC box
.
FIGURE 1:
DC COVER PLATE (Tightening sequence and torque specification.)
